CAM Pathway | Crassulacean Acid Metabolism

Crassulacean acid metabolism, also known as CAM photosynthesis, is a carbon fixation pathway that evolved in some plants as an adaptation to arid conditionsthat allows a plant to photosynthesize during the day, but only exchange gases at night. In a plant using full CAM, the stomata in the leaves remain shut during the day to reduce evapotranspiration, but they open at night to collect carbon dioxide (CO2) and allow it to diffuse into the mesophyll cells. The CO2 is stored as the four-carbon acid malic acid in vacuoles at night, and then in the daytime, the malate is transported to chloroplasts where it is converted back to CO2, which is then used during photosynthesis. The pre-collected CO2 is concentrated around the enzyme RuBisCO, increasing photosynthetic efficiency. This mechanism of acid metabolism was first discovered in plants of the family Crassulaceae.
During the night, a plant employing CAM has its stomata open, allowing CO2 to enter and be fixed as organic acids by a PEP reaction similar to the C4 pathway. The resulting organic acids are stored in vacuoles for later use, as the Calvin cycle cannot operate without ATP and NADPH, products of light-dependent reactions that do not take place at night.

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[@gp235801]

What about oxygen evolution during light reactions? The oxygen produced is released in day or night time in succulent plants??

[@umerfarooqbiology7083]

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[@hussainbiology]

thanks for appreciation..Glad it helps ✌️

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[@hussainbiology]

yes..

[@knowfactsbyaditya]

Very helpful for me and other students also❤❤❤

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Reference book name plz

[@hussainbiology]

Plant Physiology Taiz

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[@hussainbiology]

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[@hussainbiology]

thanks for appreciation..Glad it helps ✌️

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👍

[@parvathalumadgula3742]

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[@moderncybergamer3076]

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[@hariprasad6871]

where does the oxygen produced during the photosynthesis process of day time go? is it stored somewhere and released during night while CO2 is being absorbed?

[@Animeeegojo]

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[@hareemfarooq048]

You are life saver.

[@hussainbiology]

thanks Hareem for appreciation.. Glad it helps ✌️

[@amirhusseinfathi]

Thank you!

[@hussainbiology]

You're welcome!

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[@hussainbiology]

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[@abdulhafeezpanhwar8228]

Absolutely phenomenal, thank you!

[@pk_1393]

I think this video should be included in the Plant Physiology Playlist.

[@hussainbiology]

yes

[@mugarurabrian1834]

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[@mugarurabrian1834]

thanks Dr

[@hussainbiology]

thanks for appreciation..Glad it helps ✌️

[@michaeleisenberg7867]

🌵🪴🌴 👏👏👏 Shabir, Very interesting. Thank you!!

[@hussainbiology]

Lots of love.. Dr Mike